Here's some that I use:

BPlant for finding your ecoregion in the North American continent:
https://bplant.org/regions.php

Chesapeake Bay Watershed (DC, Delaware, Maryland, New York, Pennsylvania, Virginia and West Virginia) Native Plant Finder:
https://www.allianceforthebay.org/native-plant-center/

Native ground covers for the North American Eastern Temperate Forests:
https://choosenatives.org/articles/plant-native-ground-covers-make-america-green/

Information on creating soft landings under trees for pollinators:
https://www.pollinatorsnativeplants.com/uploads/1/3/9/1/13913231/softlandingskeystonehandout.pdf

These two blog posts (also Eastern Temperate Forests) are probably a looser fit for the wiki, but I'll share them here anyway. The first discusses why not to be afraid of "aggressive" plants and how to start experimenting. The second has a list of 20 ground covers:
https://www.humanegardener.com/how-to-fight-plants-with-plants/
https://www.humanegardener.com/pulling-stiltgrass/

Thanks for bringing this back to my mind. My landlord is looking to do something with the "lawn" and I would rather plant native grasses since we are in a dry climate. Neither one of us wants to water or mow. I have been looking at things but maybe here I can bounce some ideas off folks who live in a similar climate.

If you find any good resources, let me know and I'll add them to the wiki! Good luck

This is great stuff! Thanks for getting it set up here

Thanks for doing that!